CN220492202U - Broadband end-fire antenna applied to X frequency band - Google Patents
Broadband end-fire antenna applied to X frequency band Download PDFInfo
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- CN220492202U CN220492202U CN202321810345.4U CN202321810345U CN220492202U CN 220492202 U CN220492202 U CN 220492202U CN 202321810345 U CN202321810345 U CN 202321810345U CN 220492202 U CN220492202 U CN 220492202U
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- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
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- 230000008859 change Effects 0.000 description 9
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- 238000004891 communication Methods 0.000 description 5
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Abstract
The utility model discloses a broadband end-fire antenna applied to an X frequency band, which comprises: the antenna comprises a medium substrate, a medium lens, a first radiation patch, a second radiation patch, a microstrip feeder and a ground plane, wherein the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the second radiation patch and the ground plane are arranged on the back surface of the medium substrate in a printing mode, a part of the medium lens, which is not provided with the radiation patch, on the upper end surface of the medium substrate, is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens is an opening cuboid, and an embedded opening is arranged in the opening cuboid.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a broadband end-fire antenna applied to an X frequency band.
Background
An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space) or vice versa. A component for transmitting or receiving electromagnetic waves in a radio device. The antenna is used as a key medium for receiving and transmitting electromagnetic signals in a wireless communication system, the performance of the antenna is closely related to the reliability and effectiveness of wireless communication quality, the antenna is subjected to technical development for many years, the types of the antenna are different, and the application scenes are also different. The end-fire antenna is used as a directional antenna with strong directivity, and provides a high-performance radiation mode by virtue of the unique directional characteristic. Compared with the traditional omni-directional radiation antenna, the end-fire antenna has excellent beam directional performance and strong anti-interference capability, and is easier to realize high-quality and stable point-to-point wireless communication.
With the complexity of electromagnetic environments and the high integration and light weight of microwave devices nowadays, the broadband characteristics of antennas and the miniaturization of antenna structures are receiving more attention as important indicators. Broadband antennas have a wider operating band range, higher reliability and lower cost of use, so that broadband antennas are often used in practical applications to replace multiple element antennas or multiple frequency antennas.
The existing miniaturized design scheme of the end-fire antenna can reduce the size of the antenna, but can deteriorate the directivity and gain performance of the antenna to a certain extent, and has no broadband characteristic generally, so that the designed antenna cannot realize a broadband and high-performance directional radiation state.
Summary of the utility model
The utility model provides a broadband end-fire antenna applied to an X frequency band, which aims to solve the technical problems of high gain and poor directivity of a miniaturized broadband end-fire antenna in the prior art.
The inventive embodiment of the utility model provides a broadband end-fire antenna applied to an X frequency band, which comprises:
the antenna comprises a dielectric substrate, a dielectric lens, a first radiation patch, a second radiation patch, a microstrip feeder line and a ground plane; the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the other end of the microstrip feeder extends to the lower edge of the medium substrate, the second radiation patch and the grounding surface are arranged on the back surface of the medium substrate in a printing mode, the second radiation patch and the first radiation patch are arranged in mirror symmetry relative to the vertical midline of the medium substrate, the lower part of the second radiation patch is connected with the grounding surface through the microstrip line, the medium lens is intersected with the medium substrate, the part of the surface of the upper end of the medium substrate without the radiation patch is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate, the dielectric lens is an opening cuboid, an embedded opening is arranged in the opening cuboid, and the non-radiation patch part of the dielectric substrate is embedded and fixed into the dielectric lens through the embedded opening.
Further, the first radiation patch and the second radiation patch point are irregular pentagons, the irregular pentagons are obtained by respectively cutting an upper left triangle and a lower right triangle through rectangles, two L-shaped right-angle grooves which are not communicated mutually are respectively formed in the first radiation patch and the second radiation patch, the proportion of the two L-shaped right-angle grooves is the same, the L-shaped right-angle grooves which are close to the sides of the rectangular notch are smaller than the L-shaped right-angle grooves which are far away from the sides of the rectangular notch, the connecting line of the central points of the two L-shaped right-angle grooves which are not communicated mutually is perpendicular to the rectangular notch, and the area proportion of the rectangular grooves of the two L-shaped right-angle grooves which are not communicated mutually is 7.9.
Further, the ratio of the five sides of the first radiation patch to the ratio of the five sides of the second radiation patch are respectively: 8.56:4.94:1:10.01:3.17.
Furthermore, the dielectric substrate is cuboid, and is made of polytetrafluoroethylene composite material with ceramic filler, and the relative dielectric constant is 3.
Furthermore, the dielectric lens adopts polytetrafluoroethylene, and the relative dielectric constant is 2.1.
Further, the microstrip feeder is located at the center line of the dielectric substrate and is rectangular, one end of the microstrip feeder is connected below the first radiation patch, and the other end of the microstrip feeder extends to the lower edge of the dielectric substrate.
Furthermore, the grounding surface is in a rounded rectangular shape, and the left and right ends of the upper part of the rectangle are in a quarter arc structure; the ground plane is connected with the second radiation patch and is an inscribed circular arc-shaped microstrip structure, the inscribed circular arc-shaped microstrip structure is a quarter circular arc-shaped structure and is respectively positioned at the left side and the right side of the bottom of the microstrip structure and is connected with the ground plane, and the microstrip structure is provided with a rectangular microstrip line and is connected with the second radiation patch.
The utility model provides a broadband end-fire antenna applied to an X frequency band, which is characterized in that a dielectric substrate, a dielectric lens, a first radiation patch, a second radiation patch, a microstrip feeder line and a ground plane are arranged; the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the other end of the microstrip feeder extends to the lower edge of the medium substrate, the second radiation patch and the grounding surface are arranged on the back surface of the medium substrate in a printing mode, the second radiation patch and the first radiation patch are arranged in mirror symmetry relative to the vertical midline of the medium substrate, the lower part of the second radiation patch is connected with the grounding surface through the microstrip line, the medium lens is intersected with the medium substrate, the part of the surface of the upper end of the medium substrate without the radiation patch is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate, the dielectric lens is an opening cuboid, an embedded opening is arranged in the opening cuboid, and the non-radiation patch part of the dielectric substrate is embedded and fixed into the dielectric lens through the embedded opening. By arranging the antenna of the radiating patch with the antipodal different-surface structure, the requirement of low cross polarization is further realized on the basis of meeting miniaturization, and the input impedance of the antenna is easier to realize impedance matching with a transmission line with the impedance of 50 omega. And the width of the middle gap of the left and right radiation patches of the antenna is gradually changed, so that the resonance bandwidth is not easily limited by the minimum size of the gap, and the broadband characteristic of the antenna is more easily obtained. And higher high gain radiation can be achieved with the radiation patch.
Drawings
Other features, objects and advantages of the utility model will become more apparent from reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a wideband end-fire antenna applied to an X-band according to the present utility model;
fig. 2 is a schematic structural diagram of a dielectric lens in a wideband end-fire antenna applied to an X-band according to the present utility model;
FIG. 3 is a chart of voltage standing wave ratio of the broadband end-fire antenna applied to the X frequency band;
fig. 4 is a diagram of an antenna corresponding to a wideband end-fire antenna applied to an X frequency band at a frequency of 8 GHz;
FIG. 5 is a diagram of a broadband end-fire antenna applied to the X-band according to the present utility model at a frequency of 10 GHz;
FIG. 6 is a diagram of a broadband end-fire antenna applied to the X-band according to the present utility model at 12 GHz;
fig. 7 is a peak gain diagram of a wideband end-fire antenna applied to an X-band according to an embodiment of the present utility model.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the utility model, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present utility model can be understood by those of ordinary skill in the art in a specific case.
The utility model will be described in detail below with reference to the drawings in connection with embodiments. Fig. 1 is a schematic structural diagram of a wideband end-fire antenna applied to an X-band according to an embodiment of the present utility model, referring to fig. 1, where the wideband end-fire antenna applied to the X-band includes: the antenna comprises a dielectric substrate, a dielectric lens, a first radiation patch, a second radiation patch, a microstrip feeder line and a ground plane; the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the other end of the microstrip feeder extends to the lower edge of the medium substrate, the second radiation patch and the grounding surface are arranged on the back surface of the medium substrate in a printing mode, the second radiation patch and the first radiation patch are arranged in mirror symmetry relative to the vertical midline of the medium substrate, the lower part of the second radiation patch is connected with the grounding surface through the microstrip line, the medium lens is intersected with the medium substrate, the part of the surface of the upper end of the medium substrate without the radiation patch is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate, the dielectric lens is an opening cuboid, an embedded opening is arranged in the opening cuboid, and the non-radiation patch part of the dielectric substrate is embedded and fixed into the dielectric lens through the embedded opening.
In this embodiment, the dielectric substrate is used as a carrier, and the first radiation patch and the microstrip feeder are disposed on the front surface of the dielectric substrate in a printing manner. The second radiation patch is symmetrically arranged with the first radiation patch. The non-radiation patch part of the upper end surface of the medium substrate 1 is embedded into the upper end of the medium lens, the lower end of the medium lens is provided with a rectangular notch, and the left side and the right side of the inner part of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate. The antenna adopting the radiating patch with the antipodal different-surface structure can meet the low cross polarization requirement, and the input impedance of the antenna is easier to realize impedance matching with a transmission line with the impedance of 50 omega. And the width of the middle gap of the left and right radiation patches of the antenna is gradually changed, so that the resonance bandwidth is not easily limited by the minimum size of the gap, and the broadband characteristic of the antenna is more easily obtained. Fig. 2 is a schematic structural diagram of a dielectric lens in a broadband end-fire antenna applied to an X-band, referring to fig. 2, the dielectric lens is a cuboid with a rectangular notch at the lower end, a rectangular groove is formed in the top cuboid, the size of the rectangular groove is consistent with that of a metal-free patch part at the upper end of a dielectric substrate, the upper end of the dielectric substrate is embedded into a specific rectangular groove of the dielectric lens, the inner sides of the cuboids at the left end and the right end of the dielectric lens are connected with two side edges of the dielectric substrate, and the lower end of the dielectric lens extends to the lower edge of the dielectric substrate. The dielectric lens loaded in the end-fire direction of the antenna can be equivalent to a guiding structure for improving the radiation capacity of the antenna, so that the discontinuity of electromagnetic signals transmitted to free space at the end of the aperture of the antenna is effectively improved, the radiation of the antenna is concentrated in the end-fire direction, the directional radiation efficiency of a main lobe at the aperture of the antenna is improved, and the directivity of radiation beams is optimized. And the dielectric lenses are covered on the two sides of the dielectric substrate of the antenna to effectively inhibit side lobe radiation, weaken electromagnetic wave scattering on the two sides of the antenna, concentrate electromagnetic energy radiation in the end-firing direction and improve the gain performance of the antenna. The gain performance of the antenna is effectively improved by utilizing the dielectric lens loading technology, the directivity of the whole working frequency band is improved, a stable directional radiation mode is obtained, and the highest gain can reach 11.4dBi. The dielectric lens has the advantages of reliable material, easy processing, low implementation cost, no structural interference with the antenna dielectric substrate, easy assembly and stable structure.
Optionally, the first radiation paster and the second radiation paster point are irregular pentagon, irregular pentagon is obtained by cutting upper left triangle and lower right triangle respectively by the rectangle, be equipped with two L type right angle grooves that are not mutually connected on the first radiation paster and the second radiation paster respectively, two L type right angle grooves proportion is the same, and is close to L type right angle groove that rectangle breach side is less than keeping away from L type right angle groove that the rectangle breach side, the central point line perpendicular to of two L type right angle grooves that are not mutually connected the rectangle breach, the area proportion of the rectangular channel of two L type right angle grooves that are not mutually connected is 7.9. Through the arrangement, the design of the conical edges below the first irregular pentagon radiating patch and the second irregular pentagon radiating patch can reduce the whole area of the antenna relative to a structure with a complete right angle below the traditional structure, so that miniaturization of the antenna can be effectively realized, the shape of the outer edge taper can be changed, and the shape parameters of the taper can be adjusted according to the radiation pattern of the antenna, namely the length of each edge in the pentagon, so that a good front-to-back ratio of the pattern can be obtained. The high-frequency current propagates and radiates on the upper edge of the gradual change radiation slot line, the shape of the gradual change slot line has important influence on performance indexes such as antenna radiation directivity, and the like, compared with the traditional curve gradual change slot line antenna formed by the inner edges of the irregular pentagon first radiation patch and the second radiation patch, such as a Gaussian curve type gradual change slot line, an exponential curve type gradual change slot line, a parabolic curve type gradual change slot line, and the like, the electromagnetic energy radiation of the linear gradual change slot line antenna is concentrated, the narrower half-power beam width can be obtained, the high-gain radiation of the antenna is easier to realize, the radiation main lobe beam has no angular offset in the end-firing direction, and particularly, the deviation in the high-frequency band is more obvious, so that the antenna can provide better signal quality and anti-interference capability.
A pair of L-shaped grooves are sequentially loaded downwards along the upper parts of the first radiation patch and the second radiation patch, the L-shaped grooves are not communicated, the radiation patch is loaded with the double-L-shaped grooves, so that more surface current can be distributed at the edges of the L-shaped grooves instead of the edges of the radiation arms, unnecessary surface current is prevented from being distributed at the outer edges of the radiation arms in a large quantity, the radiation performance of the antenna can be deteriorated due to the fact that the current distributed at the outer edge parts of the radiation arms can excite unnecessary radiation, the radiation performance of the antenna can be mainly reflected in the bad situations such as antenna gain reduction, sidelobe level and backward radiation increase or pattern distortion, unnecessary surface current which causes vertical radiation along the end-to-radiation direction can be effectively restrained through loading of the double-L-shaped groove structure on the radiation metal arms, electromagnetic energy is effectively restrained to the vicinity of gradual change groove lines, the sidelobe restraining effect is achieved, and the directional beam radiation performance of the antenna is improved. Meanwhile, the design effectively prolongs the effective electrical length of the current path on the surface of the antenna, can effectively reduce the low-frequency cut-off frequency of the antenna and expands the low-frequency bandwidth. The double-L-shaped slot can be characterized as a group of RLC resonant circuit units, the resonant frequency of the double-L-shaped slot is related to the size data of the double-L-shaped slot, and the designed antenna can obtain good impedance matching performance in an X frequency band and simultaneously effectively realize the miniaturized design of the antenna through reasonably optimizing the size parameters. In this embodiment, the connection lines between the five points a, B, C, D, and E in the figure are the first radiation patch areas. The length proportion of the five sides of the first radiation patch is respectively as follows: 8.56:4.94:1:10.01:3.17. Correspondingly, the proportion of the five sides of the second radiation patch is 8.56:4.94:1:10.01:3.17. Compared with the existing gaps with various shapes, the processing and calculation amount of parameters are reduced in design, parameter optimization is easier to achieve the design purpose, the processing difficulty is low, the production and adjustment and measurement are easy, and the design error is convenient to reduce.
The dielectric substrate can be cuboid, and is made of polytetrafluoroethylene composite material with ceramic filler, and the relative dielectric constant is 3. Correspondingly, the dielectric lens adopts polytetrafluoroethylene, and the relative dielectric constant is 2.1. The shape of the dielectric lens is cuboid with a rectangular notch at the lower end. The upper end of the dielectric lens 2 is internally provided with a rectangular cavity.
The microstrip feeder line is rectangular in shape and is positioned at the center line of the dielectric substrate, one end of the microstrip feeder line is connected below the first radiation patch, and the other end of the microstrip feeder line extends to the lower edge of the dielectric substrate. The grounding surface is in a rounded rectangular shape, and the left end and the right end of the upper part of the rectangle are in a quarter arc structure; the ground plane is connected with the second radiation patch and is an inscribed circular arc-shaped microstrip structure, the inscribed circular arc-shaped microstrip structure is a quarter circular arc-shaped structure and is respectively positioned at the left side and the right side of the bottom of the microstrip structure and is connected with the ground plane, and the microstrip structure is provided with a rectangular microstrip line and is connected with the second radiation patch.
Fig. 3 is a voltage standing wave ratio graph of the broadband end-fire antenna applied to the X frequency band, wherein the voltage standing wave ratio is smaller than 2 in the frequency band of 6.4GHz-13.5GHz, the impedance bandwidth is good, and the relative bandwidth reaches 71.3%, so that the antenna unit can effectively work in the full frequency band of the X frequency band.
Fig. 4, fig. 5, and fig. 6 are respectively diagrams of the broadband end-fire antenna applied to the X-band and provided by the present utility model, where E/H refers to an electric field/magnetic field, and it can be seen from the foregoing diagrams that the broadband end-fire antenna radiation pattern applied to the X-band shows an end-fire state, which illustrates that the radiation mechanism is an end-fire antenna radiation mechanism, and has good directional radiation characteristics, an electromagnetic radiation beam concentrates the end-fire direction, a radiation gain is 10.1dBi at 8GHz, a radiation gain is 10.8dBi at 10GHz, and a radiation gain is 11.3dBi at 12GHz, so that the antenna E-plane and H-plane show good directionality in the X-band.
Fig. 7 is a peak gain diagram of the wideband end-fire antenna applied to the X-band according to the inventive embodiment of the present utility model, wherein the abscissa in fig. 7 is frequency, and the ordinate is gain size, and it can be seen from fig. 7 that the gain of the array antenna is greater than 8.1dBi in the frequency band of 6.4-13.5GHz, the gain performance is stable in the X-band, and the maximum gain at the frequency point of 11.2GHz can reach 11.4dBi, which indicates that the array antenna has higher gain in the working frequency band and excellent radiation performance.
The utility model provides a broadband end-fire antenna applied to an X frequency band, which is characterized in that a dielectric substrate, a dielectric lens, a first radiation patch, a second radiation patch, a microstrip feeder line and a ground plane are arranged; the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the other end of the microstrip feeder extends to the lower edge of the medium substrate, the second radiation patch and the grounding surface are arranged on the back surface of the medium substrate in a printing mode, the second radiation patch and the first radiation patch are arranged in mirror symmetry relative to the vertical midline of the medium substrate, the lower part of the second radiation patch is connected with the grounding surface through the microstrip line, the medium lens is intersected with the medium substrate, the part of the surface of the upper end of the medium substrate without the radiation patch is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate, the dielectric lens is an opening cuboid, an embedded opening is arranged in the opening cuboid, and the non-radiation patch part of the dielectric substrate is embedded and fixed into the dielectric lens through the embedded opening. By arranging the antenna of the radiating patch with the antipodal different-surface structure, the requirement of low cross polarization is further realized on the basis of meeting miniaturization, and the input impedance of the antenna is easier to realize impedance matching with a transmission line with the impedance of 50 omega. And the width of the middle gap of the left and right radiation patches of the antenna is gradually changed, so that the resonance bandwidth is not easily limited by the minimum size of the gap, and the broadband characteristic of the antenna is more easily obtained. And higher high gain radiation can be achieved with the radiation patch. The dielectric lens loaded in the end-fire direction of the antenna can be equivalent to a guiding structure for improving the radiation capacity of the antenna, so that the discontinuity of electromagnetic signals transmitted to free space at the end of the aperture of the antenna is effectively improved, the radiation of the antenna is concentrated in the end-fire direction, the directional radiation efficiency of a main lobe at the aperture of the antenna is improved, and the directivity of radiation beams is optimized. And the dielectric lenses are covered on the two sides of the dielectric substrate of the antenna to effectively inhibit side lobe radiation, weaken electromagnetic wave scattering on the two sides of the antenna, concentrate electromagnetic energy radiation in the end-firing direction and improve the gain performance of the antenna. The gain performance of the antenna is effectively improved by utilizing the dielectric lens loading technology, the directivity of the whole working frequency band is improved, and the stable directional radiation mode utilization is obtained. Electromagnetic energy radiation of a linear gradient slot line antenna department formed by the inner edges of the irregular pentagon first radiation patch and the second radiation patch is concentrated, narrower half-power beam width can be obtained, high-gain radiation of the antenna is easier to realize, and the radiation main lobe beam has no angular offset in the end-fire direction, so that better signal quality and anti-interference capability are provided. By loading the double L-shaped groove structure on the radiation metal arm, unnecessary surface current which causes vertical radiation along the end-fire direction can be effectively restrained, electromagnetic energy is effectively restrained to the vicinity of the gradual change groove line, the effect of sidelobe suppression is achieved, and the directional beam radiation performance of the antenna is improved.
Note that the above is only a preferred embodiment of the utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of numerous modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit of the utility model, which is set forth in the following claims.
Claims (7)
1. A broadband end-fire antenna for the X-band, comprising:
the antenna comprises a dielectric substrate, a dielectric lens, a first radiation patch, a second radiation patch, a microstrip feeder line and a ground plane; the first radiation patch and the microstrip feeder are arranged on the front surface of the medium substrate in a printing mode, the first radiation patch is electrically connected with the microstrip feeder, one end of the microstrip feeder is electrically connected with the first radiation patch, the other end of the microstrip feeder extends to the lower edge of the medium substrate, the second radiation patch and the grounding surface are arranged on the back surface of the medium substrate in a printing mode, the second radiation patch and the first radiation patch are arranged in mirror symmetry relative to the vertical midline of the medium substrate, the lower part of the second radiation patch is connected with the grounding surface through the microstrip line, the medium lens is intersected with the medium substrate, the part of the surface of the upper end of the medium substrate without the radiation patch is embedded into the upper end of the medium lens, a rectangular notch is arranged at the lower end of the medium lens, and the left side and the right side of the rectangular notch of the medium lens are contacted with the left side and the right side of the medium substrate; the dielectric lens does not cover the metal radiation patch part on the dielectric substrate, the dielectric lens is an opening cuboid, an embedded opening is arranged in the opening cuboid, and the non-radiation patch part of the dielectric substrate is embedded and fixed into the dielectric lens through the embedded opening.
2. The antenna of claim 1, wherein the first radiating patch and the second radiating patch are irregular pentagons, the irregular pentagons are obtained by cutting an upper left triangle and a lower right triangle respectively by a rectangle, two mutually non-communicated L-shaped right-angle grooves are respectively formed in the first radiating patch and the second radiating patch, the proportion of the two L-shaped right-angle grooves is the same, the L-shaped right-angle grooves close to the side of the rectangular notch are smaller than the L-shaped right-angle grooves far away from the side of the rectangular notch, the connecting line of the central points of the two mutually non-communicated L-shaped right-angle grooves is perpendicular to the rectangular notch, and the area proportion of the rectangular grooves of the two mutually non-communicated L-shaped right-angle grooves is 7.9.
3. The antenna of claim 2, wherein the ratio of the five sides of the first radiating patch and the second radiating patch is: 8.56:4.94:1:10.01:3.17.
4. The antenna of claim 1, wherein the dielectric substrate is a cuboid, and the dielectric substrate is a polytetrafluoroethylene composite material with ceramic filler and has a relative dielectric constant of 3.
5. The antenna of claim 1, wherein the dielectric lens is polytetrafluoroethylene and has a relative permittivity of 2.1.
6. The antenna of claim 1, wherein the microstrip feed line is located at a center line position of the dielectric substrate and has a rectangular shape, one end of the microstrip feed line is connected below the first radiation patch, and the other end extends to a lower edge of the dielectric substrate.
7. The antenna of claim 1, wherein the ground plane has a rounded rectangular shape, and the upper left and right ends of the rectangle have a quarter-circular arc structure; the ground plane is connected with the second radiation patch and is an inscribed circular arc-shaped microstrip structure, the inscribed circular arc-shaped microstrip structure is a quarter circular arc-shaped structure and is respectively positioned at the left side and the right side of the bottom of the microstrip structure and is connected with the ground plane, and the microstrip structure is provided with a rectangular microstrip line and is connected with the second radiation patch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321810345.4U CN220492202U (en) | 2023-07-11 | 2023-07-11 | Broadband end-fire antenna applied to X frequency band |
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| CN202321810345.4U CN220492202U (en) | 2023-07-11 | 2023-07-11 | Broadband end-fire antenna applied to X frequency band |
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| CN202321810345.4U Active CN220492202U (en) | 2023-07-11 | 2023-07-11 | Broadband end-fire antenna applied to X frequency band |
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| Country | Link |
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| CN (1) | CN220492202U (en) |
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2023
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